From 0a6b636e699f2b54d6c1ccf74dcb6d9e65a22eea Mon Sep 17 00:00:00 2001
From: Elichai Turkel <elichai.turkel@gmail.com>
Date: Wed, 27 Nov 2019 22:26:12 +0200
Subject: [PATCH] Making RWLock::new const fn

---
 src/libstd/sync/rwlock.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/libstd/sync/rwlock.rs b/src/libstd/sync/rwlock.rs
index b1b56f321fc6b..846d9742fc1f4 100644
--- a/src/libstd/sync/rwlock.rs
+++ b/src/libstd/sync/rwlock.rs
@@ -65,7 +65,7 @@ use crate::sys_common::rwlock as sys;
 /// [`Mutex`]: struct.Mutex.html
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RwLock<T: ?Sized> {
-    inner: Box<sys::RWLock>,
+    inner: sys::RWLock,
     poison: poison::Flag,
     data: UnsafeCell<T>,
 }
@@ -129,9 +129,9 @@ impl<T> RwLock<T> {
     /// let lock = RwLock::new(5);
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn new(t: T) -> RwLock<T> {
+    pub const fn new(t: T) -> RwLock<T> {
         RwLock {
-            inner: box sys::RWLock::new(),
+            inner: sys::RWLock::new(),
             poison: poison::Flag::new(),
             data: UnsafeCell::new(t),
         }